PHP7-MySQLi在分頁中的應用

獲取頁碼,設置每頁行數

$page = $_POST["page"];
if($page == ""||$page <= 0){
    $page = 1;
}
$pageSize = 15;

打開MySQL數據庫

$mysqli = new mysqli($mysql_server_name,$mysql_username,$mysql_password,$mysql_database);

執行SQL語句

$result = $mysqli->query("select 1 from record_visitor");

獲取數據總行數

$rowCount = $result->num_rows;
//$rowCount = $result->num_rows是mysqli面向對象風格,等同於$rowCount = mysqli_num_rows($result);

獲取數據總頁數

$pageNum = ceil($rowCount / $pageSize);
if($page > $pageNum){
    $page = 1;
}

獲取數據的偏移量

$offset = ($page - 1) * $pageSize;
//獲取的數據從$offset+1開始,例:$page=0,$offset=0,從第1個數據向后推移;$page=2,$offset=5,從第6個數據向后推移.

獲取當前頁的數據

$result = $mysqli->query("select ip,referer,href from visitor order by time desc limit $offset,$pageSize");
//從$offset+1個數據開始展現$pageSize個數據,例:數據1-10,$page=0,$offset=0,$pageSize=5,展現:6,7,8,9,10.

展現數據

while ($row = $result->fetch_assoc()) {
    echo $row["ip"];
    echo $row["referer"];
    echo $row["href"];
}
//$row = $result->fetch_assoc()是mysqli面向對象風格,等同於$row = mysqli_fetch_assoc($result);循環輸出每行數據.

PHP7-MySQLi在分頁中的應用